Neonate Born to Bombay Oh Mother

We had a mother (R1R1 K-neg) from Tamil Nadu who had several visits to our hospital.  Anti-H lectin was negative.  Here is a summary of her workup:

Mother’s ABO/D Typing:

Mother’s Antibody Screen:

Mother’s Antibody Identification:

She gave birth to a baby girl, group B, R1R1 K-neg.  This is the neonate’s workup:

Despite the weakly positive IgG DAT, the eluate was negative.  The neonate was asymptomatic.

Anti-H is mainly an IgM antibody and does not cross the placenta, thus no HDFN was noted.